Here are the heights (in inches) of 8 students in a seminar.
72, 65, 72, 61, 70, 66, 62, 68
What is the percentage of these students who are shorter than 71 inches?

75% of the students are shorter than 71 inches

Step-by-step explanation:

Part A: Geometric Sequence

Part B:

Part C: a₈ = 512

Step-by-step explanation:

When we find the common ratio between the y-values (x-values are n inputs), we should see that we get r = 2. That means we have a geometric sequence.

Because we have a geometric sequence, our recursive formula is: . Simply plug in our known variables:

Now we need to find what y is when x = 8, so (I used explicit formula):

a₈ = 512